Zvaigznes HD161796 absorbcijas spektra analīze un modelēšana

6533b858fe1ef96bd12b67c3

RESEARCH PRODUCT

Zvaigznes HD161796 absorbcijas spektra analīze un modelēšana

subject

absorbcijas spektrs atmosfēru modeļu metode Zvaigžņu evolūcija protoplanetārais miglājs Fizika ķīmiskais sastāvs

description

Šajā darbā veikta protoplanetārā miglāja evolūcijas stadijā esošās zvaigznes HD161796 absorbcijas spektra analīze. Spektroskopiskā analīze balstīta uz augstas izšķirtspējas absorbcijas spektru, kas iegūts Tereskolas observatorijā 2013.g.martā, un tiek veikta viļņu garuma diapazonā no 4000 līdz 8400 Å. Šajā darbā veikta spektra redukcija, noteikts zvaigznes radiālais ātrums vr= -56.0±1.2 km/s un veikti ekvivalento platumu mērījumi. Izmantojot atmosfēru modeļu metodi, noteiktas zvaigznes atmosfērā esošo ķīmisko elementu koncentrācijas, kas salīdzinātas ar Saules koncentrāciju vērtību. Precizēti zvaigznes atmosfēras parametri: efektīvā temperatūra Teff=7000K, brīvās krišanas paātrinājums log(g) =0.0-0.5cgs un mikroturbulences ātrums ξ = 5.0 km/s. Iegūtie rezultāti salīdzināti ar literatūras datiem un zvaigžņu evolūcijas teoriju.

year	journal	country	edition	language
2015-01-01

https://dspace.lu.lv/dspace/handle/7/28882

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